The Ants of the Baltic Amber. 79 



to correlate them with the workers, because much more material than 

 I have seen will be needed for this task, and because it can be under- 

 taken only after the males of the recent species have been more care- 

 fully studied. 



To Mayr's description of the worker D. haliicus the following 

 remarks may be added: The head is large, broader behind than in front, 

 with distinct posterior corners and concave posterior border. The eyes 

 are large, but only moderately convex. The antennal scapes do not 

 surpass the posterior border of the head, as Mayr states and, in fact, 

 do not reach it; the funicular joints are all less than twice as long as 

 broad, except the last one. The thorax is stout, the humeri of the 

 pronotum distinctly, though bluntly, angular, the pronotum nearly twice 

 as broad as long, the mesonotum elliptical, only a little longer than broad, 

 the base of the epinotum about ^/^ longer than broad and its straight pos- 

 terior about V/g longer than its anterior margin; its sides are straight. 

 The whole body is shining and finely shagreened, the head also covered 

 with coarse but shallow punctures, the neck and declivity of the epi- 

 notum are transversely rugose. The hairs on the body are erect and 

 sparse and most abundant on the gaster; on the legs and scapes they 

 are very short and appressed. 



I have seen 18 workers two males and two females of this species, 

 in addition to the two dubious males mentioned above. These specimens 

 are distributed as follows: one worker (without a number) in the Brussells 

 Museum, five workers and a male in the Klebs Coll. (K 766, K 5080, 

 K 1054, K 1752, « 30, K 5109); one male, 11 workers and two females 

 in the Geolog. Inst. Koenigsberg Coll. (7636/350, Mayr's type; 10836/775, 

 B 5236, B 19736, B 19729, B 18553, B 18957, B 18732, B 18603, and 

 6 without numbers). 



Dolichoderus (Hypoclinea) passalom^na sp nov. 



Worker (Fig. 34). Length about 7 mm. 



Head, excluding the mandibles, somewhat longer than broad, 

 elliptical, but little narrower in front than behind, without distinct 

 posterior corners, with nearly straight posterior and convex lateral borders. 

 Eyes a little behind the middle of the sides of the head, small, very 

 convex and somewhat conical, as high as broad, consisting of very 

 small ommatidia. Anterior border of clypeus rather deeply excised in 

 the middle. Antennae slender, scapes reaching a little beyond the 

 posterior border of the head; joints 1 — 3 of the funiculus more than 

 twice as long as broad, remaining joints nearly twice as long as 

 broad. Thorax rather short and stout. Pronotum fully twice as 



